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Finding the Fourth Proportional to 8,456.63, 12,687.06 and 3,191.63

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Solution

The fourth proportional to 8,456.63, 12,687.06 and 3,191.63 is: 4,788.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,456.63 : 12,687.06 = 3,191.63 : x
  2. Step 2: Convert to fraction form
    8,456.63/12,687.06 = 3,191.63/x
  3. Step 3: Cross multiply
    8,456.63x = 12,687.06 × 3,191.63
  4. Step 4: Simplify right side
    8,456.63x = 40,492,401.31
  5. Step 5: Solve for x
    x = 40,492,401.31/8,456.63
  6. Step 6: Final answer
    x = 4,788.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.